Vehicle Body Member Having Charging and Discharging Function

ABSTRACT

A vehicle body member includes a first cell portion including a first negative pole portion and a first positive pole portion disposed to be in contact with a surface of the first negative pole portion, a second cell portion including a second negative pole portion and a second positive pole portion disposed to be in contact with a surface of the second negative pole portion, an insulating layer disposed between the first cell portion and the second cell portion, a positive pole current collector connecting the first positive pole portion of the first cell portion and the second positive pole portion of the second cell portion in parallel, and a negative pole current collector connecting the first negative pole portion of the first cell portion and the second negative pole portion of the second cell portion in parallel.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to Korean Patent Application No. 10-2019-0167252, filed on Dec. 13, 2019, which application is hereby incorporated herein by reference.

TECHNICAL FIELD

The present invention relates generally to a vehicle body member having a charging and discharging function.

BACKGROUND

In the related art, body structures and a variety of components of a vehicle have been made of steel. Recently, composite materials, such as a fiber reinforced resin composite, are used in place of steel materials in order to improve fuel efficiency due to weight reduction.

In general, a fiber reinforced resin composite has a basic structure comprised of a reinforcing material handling or supporting a load applied to the composite and a base material serving to transfer the load applied to the composite to the reinforcing material while being combined with the reinforcing material to define an overall shape of the composite. In this case, the reinforcing material is generally a fibrous reinforcing material, such as carbon fiber, glass fiber, or aramid fiber, while the base material is generally a resin-type base material, such as a thermosetting resin or a thermoplastic resin. The thermosetting resin may be a phenol resin, an epoxy resin, or the like. The thermoplastic resin may be polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PP), or the like.

In addition, among components of a vehicle, a significant number of components are electromagnetic components (or electromagnetic devices) operated by power supplied by a battery. Recently, due to an increasing number of electromagnetic components, research into solutions for increasing the capacity of a battery of a vehicle has continuously been undertaken.

Embodiments of the present invention take into consideration that carbon fiber used as a reinforcing material of a fiber reinforced resin composite can be used as a negative pole of a secondary cell. Accordingly, embodiments of the present invention provide a vehicle body member able to realize a charging and discharging function using a reinforcing material used to reduce the weight of a vehicle and to increase the strength of the vehicle.

The foregoing is intended merely to aid in the understanding of the background of the present invention, and is not intended to mean that the present invention falls within the purview of the related art that is already known to those skilled in the art.

SUMMARY

The present invention relates generally to a vehicle body member having a charging and discharging function. Particular embodiments relate to a vehicle body member able to realize a charging and discharging function using carbon fiber that has been used for weight reduction and reinforcement.

Embodiments of the present invention have been made keeping in mind problems occurring in the related art. Embodiments of the present invention provide a vehicle body member have a charging and discharging function, in which carbon fiber that has been used as a reinforcing member in each of a roof panel and roof rails of a vehicle roof is used as a negative pole.

According to one embodiment of the present invention, there is provided a vehicle body member having a charging and discharging function. The vehicle body member may include a first cell portion including a first negative pole portion made of carbon fiber and a first positive pole portion disposed to be in contact with one surface of the first negative pole portion, the first positive pole portion including a cathode active material and a solid electrolyte, a second cell portion including a second negative pole portion made of carbon fiber and a second positive pole portion disposed to be in contact with the other surface of the second negative pole portion, the second positive pole portion including a cathode active material and a solid electrolyte, an insulating layer disposed between one surface of the first cell portion and the other surface of the second cell portion to insulate the first cell portion and the second cell portion, a positive pole current collector connecting the first positive pole portion of the first cell portion and the second positive pole portion of the second cell portion in parallel, and a negative pole current collector connecting the first negative pole portion of the first cell portion and the second negative pole portion of the second cell portion in parallel.

Each of the first negative pole portion and the second negative pole portion may be a stack of a plurality of reinforced fiber sheets, with carbon fibers thereof being arranged in different directions.

The first positive pole portion may include a first positive pole layer disposed opposite to one surface of the first negative pole portion, with the cathode active material being distributed in the first positive pole layer, and first solid electrolyte layers disposed between the first negative pole portion and the first positive pole layer to be in contact with the first negative pole portion and the first positive pole layer, respectively. The second positive pole portion may include a second positive pole layer disposed opposite to one surface of the second negative pole portion, with the cathode active material being distributed in the second positive pole layer, and second solid electrolyte layers disposed between the second negative pole portion and the second positive pole layer to be in contact with the first negative pole portion and the second positive pole layer, respectively. The first positive pole layer and the second positive pole layer may be insulated from each other by the insulating layer.

The vehicle body member may be a plurality of vehicle body members. The positive pole current collectors of the vehicle body members may be connected in parallel. The negative pole current collectors of the vehicle body members may be connected in parallel. The positive pole current collectors and the negative pole current collectors may be selectively connected to an alternator or an electromagnetic device of a vehicle via a switch. A charging operation may be performed via the vehicle body members while the positive pole current collectors and the negative pole current collectors are electrically connected to the alternator of the vehicle. Power generated by a discharging operation performed via the vehicle body members is connected to the electromagnetic device of the vehicle while the positive pole current collectors and the negative pole current collectors may be electrically connected to the electromagnetic device of the vehicle.

At least one vehicle body member of the plurality of vehicle body members may provide a roof panel of the vehicle, and the remaining vehicle body members may provide roof rails of the vehicle.

The vehicle body member providing the roof panel and the vehicle body members providing the roof rails may be insulated by an insulating member.

The first cell portion, the second cell portion, and the insulating layer may be molded from a resin.

The first negative pole portion of the first cell portion may include one or more coupling bolts. The first positive pole portion of the first cell portion, the second negative pole portion and the second positive pole portion of the second cell portion, the insulating layer, and the series connector may have one or more through-holes, through which the coupling bolts extend. Coupling nuts may be fastened to end portions of the coupling bolts fitted into the through-holes.

According to embodiments of the present invention, carbon fiber that has been used as a reinforcing member in each of a roof panel and roof rails of a vehicle roof may be used as a negative pole of a secondary cell, and a means serving as a solid electrolyte and a positive pole may be disposed inside of the roof panel and the roof rails. Accordingly, the vehicle roof may advantageously serve as a secondary cell having a charging and discharging function.

In addition, each of the roof panel and the roof rails may be fabricated as a secondary cell having a charging and discharging function. The roof panel and the roof rails may be connected in series to increase the output of the secondary cell.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other objectives, features, and advantages of the present invention will be more clearly understood from the following detailed description when taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a perspective view illustrating a vehicle in which vehicle body members having a charging and discharging function according to one embodiment of the present invention are used;

FIGS. 2A and 2B are enlarged views illustrating key portions of FIG. 1;

FIG. 3 is a cross-sectional view illustrating a vehicle body member having a charging and discharging function according to one embodiment of the present invention;

FIG. 4 is a circuit diagram illustrating the vehicle body member having a charging and discharging function according to one embodiment of the present invention; and

FIG. 5 illustrates a vehicle body member having a charging and discharging function according to another embodiment of the invention.

DETAILED DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. The present invention may, however, be embodied in a variety of different forms and should not be construed to be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present invention to a person having ordinary knowledge in the art. In the drawings, the shapes and dimensions may be exaggerated for clarity.

FIG. 1 is a perspective view illustrating a vehicle in which vehicle body members having a charging and discharging function according to one embodiment of the present invention are used, FIGS. 2A and 2B are enlarged views illustrating key portions of FIG. 1, FIG. 3 is a cross-sectional view illustrating a vehicle body member having a charging and discharging function according to one embodiment of the present invention, FIG. 4 is a circuit diagram illustrating the vehicle body member having a charging and discharging function according to one embodiment of the present invention, and FIG. 5 illustrates a vehicle body member having a charging and discharging function according to another embodiment of the invention.

Here, FIG. 2A is the enlargement of portion V1 in FIG. 1, while FIG. 2B is the enlargement of portion V2 in FIG. 1. In addition, FIG. 3 is the cross-sectional view taken along line A-A in FIG. 1.

First, the vehicle body member having a charging and discharging function according to one embodiment of the present invention may be applied to a variety of components of which a vehicle body is composed. Hereinafter, roof members of a vehicle body, i.e. a roof panel and a roof rail, will be described as examples of the vehicle body member.

As illustrated in the drawings, a plurality of vehicle body members having a charging and discharging function according to one embodiment of the present invention is provided, such that at least one vehicle body member constitutes a roof panel 20 of a vehicle body 10, and the other vehicle body members constitute roof rails 30. Here, each of the vehicle body members constituting the roof panel 20 and the roof rails 30 serves as a secondary cell having a charging and discharging function.

In this regard, each of the vehicle body members 20 and 30 includes a first cell portion 100, a second cell portion 200, an insulating layer 300, a positive pole current collector 500, and a negative pole current collector 600. The first cell portion 100 includes a first negative pole portion no made of carbon fiber and a first positive pole portion 120 disposed to be in contact with one surface of the first negative pole portion no. The composition of the first positive pole portion 120 includes a cathode active material and a solid electrolyte. The second cell portion 200 includes a second negative pole portion 210 made of carbon fiber and a second positive pole portion 220 disposed to be in contact with the other surface of the second negative pole portion 210. The composition of the second positive pole portion 220 includes a cathode active material and a solid electrolyte. The insulating layer 300 is disposed between one surface of the first cell portion 100 and the other surface of the second cell portion 200 to insulate the first cell portion 100 and the second cell portion 200 from each other. The positive pole current collector 500 connects the first positive pole portion 120 of the first cell portion 100 and the second positive pole portion 220 of the second cell portion 200 in parallel. The negative pole current collector 600 connects the first negative pole portion no of the first cell portion 100 and the second negative pole portion 210 of the second cell portion 200 in parallel. Accordingly, the first cell portion 100 and the second cell portion 200 are electrically connected to each other in parallel to increase charge and discharge capacity.

The first cell portion 100 is a means for constituting a single unit cell, and is comprised of the first negative pole portion no and the first positive pole portion 120.

Here, the first negative pole portion no is a strengthening means for reinforcing the strengths of the roof panel 20 and the roof rails 30 while defining the shapes of the roof panel 20 and the roof rails 30. According to the present embodiment, the first negative pole portion no also serves as a negative pole to perform a charging and discharging function. In this regard, the first negative pole portion no is made of carbon-based fiber to facilitate the oxidation and reduction of lithium ions.

Here, the first cell portion 100 may be provided by stacking a plurality of reinforced fiber sheets (including carbon fibers) arranged in different directions in order to enable strength reinforcement.

The first positive pole portion 120 may be a means for serving as a solid state separator as well as a positive pole for performing a charging and discharging function. The first positive pole portion 120 may be implemented by including a cathode active material used as a positive pole in a typical secondary cell. For example, the first positive pole portion 120 may include a lithium (Li) oxide. In addition, the first positive pole portion 120 may be implemented using a material used as a solid-phase electrolyte, i.e. a solid electrolyte, in a typical secondary cell.

For example, the first positive pole portion 120 may include a first positive pole layer 121 disposed opposite to one surface of the first negative pole portion 110, with the cathode active material being distributed in the first positive pole layer 121, and first solid electrolyte layers 122 disposed between the first negative pole portion no and the first positive pole layer 121 to be in contact with the first negative pole portion no and the first positive pole layer 121, respectively. Each of the first solid electrolyte layers 122 may be made of a solid electrolyte. Here, a first separator 123 separating the first negative pole portion no and the first positive pole layer 121 may further be disposed within the first solid electrolyte layers 122.

In addition, like the first cell portion 100, the second cell portion 200 is a means for constituting a single unit cell, and is comprised of the second negative pole portion 210 and the second positive pole portion 220.

Here, the second negative pole portion 210 is a reinforcing means for reinforcing the strengths of the roof panel 20 and the roof rails 30, and also serves as a negative pole for performing a charging and discharging function according to the present embodiment. In this regard, the second negative pole portion 210 is made of carbon-based fiber to facilitate the oxidation and reduction of lithium ions.

Here, the second cell portion 200 may also be provided by stacking a plurality of reinforced fiber sheets (including carbon fibers) arranged in different directions in order to enable strength reinforcement.

The second positive pole portion 220 may be a means for serving as a solid state separator as well as a positive pole for performing a charging and discharging function. The second positive pole portion 220 may be implemented by including a cathode active material used as a positive pole in a typical secondary cell. For example, the second positive pole portion 220 may include a lithium (Li) oxide. In addition, the second positive pole portion 220 may be implemented using a material used as a solid-phase electrolyte, i.e. a solid electrolyte, in a typical secondary cell.

For example, the second positive pole portion 220 may include a second positive pole layer 221 disposed opposite to one surface of the second negative pole portion 210, with the cathode active material being distributed in the second positive pole layer 221, and second solid electrolyte layers 222 disposed between the second negative pole portion 210 and the second positive pole layer 221 to be in contact with the first negative pole portion no and the second positive pole layer 221, respectively. Each of the second solid electrolyte layers 222 may be made of a solid electrolyte. Here, a second separator 223 separating the second negative pole portion 210 and the second positive pole layer 221 may further be disposed within the second solid electrolyte layers 222.

In addition, the first positive pole layer 121 and the second positive pole layer 221 are insulated from each other by an insulating layer. Accordingly, the first cell portion 100 and the second cell portion 200 are disposed on both sides of the insulating layer, respectively, such that an arrangement symmetrical with respect to the insulating layer 300 is provided.

The first cell portion 100, the second cell portion 200, and the insulating layer 300 may be molded from a resin (not shown) having an insulating property to be insulated externally while defining the shapes of the roof members 20 and 30.

In addition, in the present embodiment, the first cell portion 100 and the second cell portion 200, each of which constitutes a single unit cell, are electrically connected in parallel to increase a charging and discharging capacity.

In this regard, the positive pole current collector 500 is provided to connect the first positive pole layer 121 of the first cell portion 100 and the second positive pole layer 221 of the second cell portion 200 in parallel, and the negative pole current collector 600 is provided to connect the first negative pole portion no of the first cell portion 100 and the second negative pole portion 210 of the second cell portion 200 in parallel.

For example, the positive pole current collector 500 is sandwiched between the first positive pole layer 121 of the first cell portion 100 and the insulating layer while being sandwiched between the second positive pole layer 221 of the second cell portion 200 and the insulating layer 300 to connect the first positive pole layer 121 of the first cell portion 100 and the second positive pole portion 220 of the second cell portion 200 in parallel.

In addition, the negative pole current collector 600 is connected to the first negative pole portion no of the first cell portion 100 while being connected to the second negative pole portion 210 of the second cell portion 200 to connect the first negative pole portion no of the first cell portion 100 and the second negative pole portion 210 of the second cell portion 200 in parallel.

The vehicle body members 20 and 30 of which the vehicle body 10 is constituted typically include a single roof panel 20 and a plurality of roof rails 30.

Accordingly, as illustrated in FIG. 4, in a case in which the vehicle body members 20 and 30 include the single roof panel 20 and the plurality of roof rails 30, the positive pole current collector 500 of which the roof panel 20 is constituted and the positive pole current collector 500 of which each of the roof rails 30 is constituted are connected in parallel, while the negative pole current collector 600 of which the roof panel 20 is constituted and the negative pole current collector 600 of which each of the roof rails 30 is constituted are connected in parallel.

The positive pole current collector 500 and the negative pole current collector 600 configured as above are selectively connected to an alternator 1 or an electromagnetic device 2 of a vehicle via a switch 3.

Accordingly, while the positive pole current collector 500 and the negative pole current collector 600 are electrically connected to the alternator 1 of the vehicle, a charging operation is performed via the roof panel 20 and the roof rails 30. While the positive pole current collector 500 and the negative pole current collector 600 are electrically connected to the electromagnetic device 2 of the vehicle, power generated by a discharging operation performed via the roof panel 20 and the roof rails 30 is supplied to the electromagnetic device 2 of the vehicle.

Here, the electromagnetic device 2 is a component provided in the vehicle to be operable in response to the supply of power. For example, the electromagnetic device 2 may correspond to a variety of indoor lamps, such as a room lamp.

In addition, in the vehicle body members comprised of the roof panel 20 and the plurality of roof rails 30, the plurality of roof rails 30 are spaced apart from each other at equal distances and the roof panel 20 is disposed on top of the plurality of roof rails 30, in consideration of the structure of the vehicle body 10. Thus, an insulating member 400 may be disposed between the plurality of roof rails 30 and the roof panel 20 to provide mutual insulation.

Each of the vehicle body members 20 and 30 according to the present embodiment has a structure in which the first negative pole portion no, the first positive pole portion 120, the insulating layer 300, the second positive pole portion 220, and the second negative pole portion 210 are sequentially stacked. Since the layers are made of different materials, the strengths and bonding forces of the layers are different from each other. Accordingly, the layers may be structurally bonded in order to increase the strengths of the vehicle body members 20 and 30 by increasing the bonding force between the layers.

FIG. 5 illustrates a vehicle body member having a charging and discharging function according to another embodiment of the invention.

As illustrated in FIG. 5, the first negative pole portion no of the first cell portion 100 includes one or more coupling bolts in.

The coupling bolts 111 may be provided integrally with the first negative pole portion no by performing overmolding when fabricating the first negative pole portion no or may be fitted to the first negative pole portion no after having been fabricated as separate pieces by injection molding. FIG. 5 illustrates the coupling bolts in provided integrally with the first negative pole portion no by performing overmolding during the fabrication of the first negative pole portion no.

In addition, one or more through-holes (not shown), through which the coupling bolts in extend, are provided in the first positive pole portion 120 of the first cell portion 100, i.e. the remaining component except for the first negative pole portion no, the second negative pole portion 210 and the second positive pole portion 220 of the second cell portion 200, and the insulating layer 300.

Accordingly, when the first cell portion 100 and the second cell portion 200 are provided, the coupling bolts in provided in the first negative pole portion no may extend through the remaining components before being fastened with separate coupling nuts 211, thereby increasing the interlayer bonding force between the first cell portion ioo and the second cell portion 200.

Although the exemplary embodiments of the present invention have been described for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the present invention as disclosed in the accompanying claims. p 

What is claimed is:
 1. A vehicle body member having a charging and discharging function, the vehicle body member comprising: a first cell portion including a first negative pole portion made of carbon fiber and a first positive pole portion disposed to be in contact with a surface of the first negative pole portion, the first positive pole portion including a first cathode active material and a first solid electrolyte; a second cell portion including a second negative pole portion made of carbon fiber and a second positive pole portion disposed to be in contact with a surface of the second negative pole portion, the second positive pole portion including a second cathode active material and a second solid electrolyte; an insulating layer disposed between a surface of the first cell portion and a surface of the second cell portion and configured to insulate the first cell portion and the second cell portion; a positive pole current collector connecting the first positive pole portion of the first cell portion and the second positive pole portion of the second cell portion in parallel; and a negative pole current collector connecting the first negative pole portion of the first cell portion and the second negative pole portion of the second cell portion in parallel.
 2. The vehicle body member according to claim 1, wherein each of the first negative pole portion and the second negative pole portion comprises a stack of a plurality of reinforced fiber sheets having carbon fibers arranged in different directions.
 3. The vehicle body member according to claim 1, wherein: the first positive pole portion comprises a first positive pole layer with the first cathode active material being distributed in the first positive pole layer, and first solid electrolyte layers disposed between the first negative pole portion and the first positive pole layer, one of the first solid electrolyte layers in contact with the first negative pole portion and another one of the first solid electrolyte layers in contact with the first positive pole layer; the second positive pole portion comprises a second positive pole layer with the second cathode active material being distributed in the second positive pole layer, and second solid electrolyte layers disposed between the second negative pole portion and the second positive pole layer, one of the second solid electrolyte layers in contact with the second negative pole portion and another one of the second solid electrolyte layers in contact with the second positive pole layer; and the first positive pole layer and the second positive pole layer are insulated from each other by the insulating layer.
 4. The vehicle body member according to claim 3, further comprising: a first separator disposed between two of the first solid electrolyte layers; and a second separator disposed between two of the second solid electrolyte layers.
 5. The vehicle body member according to claim 1, wherein the vehicle body member comprises a plurality of vehicle body members, and wherein: the positive pole current collectors of the vehicle body members are connected in parallel; the negative pole current collectors of the vehicle body members are connected in parallel; and the positive pole current collectors and the negative pole current collectors are selectively connected to an alternator or an electromagnetic device of a vehicle via a switch.
 6. The vehicle body member according to claim 5, wherein the switch is configured to selectively connect to the alternator or the electromagnetic device to perform one of: a charging operation performed via the vehicle body members while the positive pole current collectors and the negative pole current collectors are electrically connected to the alternator of the vehicle; and a discharging operation performed to generate power via the vehicle body members connected to the electromagnetic device of the vehicle while the positive pole current collectors and the negative pole current collectors are electrically connected to the electromagnetic device of the vehicle.
 7. The vehicle body member according to claim 5, wherein at least one vehicle body member of the plurality of vehicle body members provides a roof panel of the vehicle, and other vehicle body members of the plurality of vehicle body members provide roof rails of the vehicle.
 8. The vehicle body member according to claim 7, wherein the vehicle body member providing the roof panel and the vehicle body members providing the roof rails are insulated by an insulating member.
 9. The vehicle body member according to claim 1, wherein the first cell portion, the second cell portion, and the insulating layer are molded from a resin.
 10. The vehicle body member according to claim 1, wherein: the first negative pole portion of the first cell portion includes one or more coupling bolts; the first positive pole portion of the first cell portion, the second negative pole portion and the second positive pole portion of the second cell portion, and the insulating layer have one or more through-holes, through which the coupling bolts extend; and coupling nuts are fastened to end portions of the coupling bolts fitted into the through-holes.
 11. A vehicle comprising: a vehicle body; and a plurality of vehicle body members attached to the vehicle body, each of the vehicle body members comprising: a first cell portion including a first negative pole portion made of carbon fiber and a first positive pole portion disposed to be in contact with a surface of the first negative pole portion, the first positive pole portion including a first cathode active material and a first solid electrolyte; a second cell portion including a second negative pole portion made of carbon fiber and a second positive pole portion disposed to be in contact with a surface of the second negative pole portion, the second positive pole portion including a second cathode active material and a second solid electrolyte; an insulating layer disposed between a surface of the first cell portion and a surface of the second cell portion and configured to insulate the first cell portion and the second cell portion; a positive pole current collector connecting the first positive pole portion of the first cell portion and the second positive pole portion of the second cell portion in parallel; and a negative pole current collector connecting the first negative pole portion of the first cell portion and the second negative pole portion of the second cell portion in parallel.
 12. The vehicle according to claim ii, wherein each of the first negative pole portion and the second negative pole portion comprises a stack of a plurality of reinforced fiber sheets having carbon fibers arranged in different directions.
 13. The vehicle according to claim ii, wherein: the first positive pole portion comprises a first positive pole layer with the first cathode active material being distributed in the first positive pole layer, and first solid electrolyte layers disposed between the first negative pole portion and the first positive pole layer, one of the first solid electrolyte layers in contact with the first negative pole portion and another one of the first solid electrolyte layers in contact with the first positive pole layer; the second positive pole portion comprises a second positive pole layer with the second cathode active material being distributed in the second positive pole layer, and second solid electrolyte layers disposed between the second negative pole portion and the second positive pole layer, one of the second solid electrolyte layers in contact with the second negative pole portion and another one of the second solid electrolyte layers in contact with the second positive pole layer; and the first positive pole layer and the second positive pole layer are insulated from each other by the insulating layer.
 14. The vehicle according to claim ii, wherein: the positive pole current collectors of the vehicle body members are connected in parallel; the negative pole current collectors of the vehicle body members are connected in parallel; and the positive pole current collectors and the negative pole current collectors are selectively connected to an alternator or an electromagnetic device of the vehicle via a switch.
 15. The vehicle according to claim 14, wherein the switch is configured to selectively connect to the alternator or the electromagnetic device to perform one of: a charging operation performed via the vehicle body members while the positive pole current collectors and the negative pole current collectors are electrically connected to the alternator of the vehicle; and a discharging operation performed to generate power via the vehicle body members connected to the electromagnetic device of the vehicle while the positive pole current collectors and the negative pole current collectors are electrically connected to the electromagnetic device of the vehicle.
 16. The vehicle according to claim 14, wherein: at least one vehicle body member of the plurality of vehicle body members provides a roof panel of the vehicle, and other vehicle body members of the plurality of vehicle body members provide roof rails of the vehicle; and the vehicle body member providing the roof panel and the vehicle body members providing the roof rails are insulated by an insulating member.
 17. The vehicle according to claim ii, wherein the first cell portion, the second cell portion, and the insulating layer are molded from a resin.
 18. The vehicle according to claim ii, wherein: the first negative pole portion of the first cell portion includes one or more coupling bolts; the first positive pole portion of the first cell portion, the second negative pole portion and the second positive pole portion of the second cell portion, and the insulating layer have one or more through-holes, through which the coupling bolts extend; and coupling nuts are fastened to end portions of the coupling bolts fitted into the through-holes.
 19. A vehicle roof panel comprising: a first cell portion including a first negative pole portion made of carbon fiber and a multi-layer first positive pole portion having a layer in contact with a surface of the first negative pole portion; a second cell portion including a second negative pole portion made of carbon fiber and a multi-layer second positive pole portion having a layer in contact with a surface of the second negative pole portion; an insulating layer disposed between a surface of the first cell portion and a surface of the second cell portion and configured to insulate the first cell portion and the second cell portion; a positive pole current collector connecting the first positive pole portion of the first cell portion and the second positive pole portion of the second cell portion in parallel; and a negative pole current collector connecting the first negative pole portion of the first cell portion and the second negative pole portion of the second cell portion in parallel.
 20. The vehicle roof panel according to claim 19, wherein: the first positive pole portion comprises: a first positive pole layer with a first cathode active material being distributed in the first positive pole layer; and first solid electrolyte layers disposed between the first negative pole portion and the first positive pole layer, one of the first solid electrolyte layers in contact with the first negative pole portion and another one of the first solid electrolyte layers in contact with the first positive pole layer; the second positive pole portion comprises: a second positive pole layer with a second cathode active material being distributed in the second positive pole layer; and second solid electrolyte layers disposed between the second negative pole portion and the second positive pole layer, one of the second solid electrolyte layers in contact with the second negative pole portion and another one of the second solid electrolyte layers in contact with the second positive pole layer; and the first positive pole layer and the second positive pole layer are insulated from each other by the insulating layer. 